Valve-gear of internal-combustion engines.



F. W. LANCHESTBR.

VALVE GEAR OF INTERNAL COMBUSTION ENGINES. APPLICATION FILED JAN. 18,1910.

990,752; Patented Apr. 25,1911" sauce-e Be it-- known that I, FREDERICKWILIQIAM Lano'nns'rrm'a subject of the King of Great Britain andIreland, residing at553 Hagley road, Edgbaston, in the county of Warwck, England, have invented certain new and use ful Improvements in theValve-Gear of Intern'al-Oombnstion Engines, of which the i following isa com lete specification.

My invention ire ates to improvements in 1 the valve gear at internalcombustion engines,'.and refers more particularly to improvements in theactuating gear and method of control of valves-of the slidingtypeespecially applicable to engines em,- plelying the Otto cycle.

1e 1nvent1on "has for its object the appli-' cation" of a variable cutofi to the intake of the working fluid in a simple andeifective manner.

The'invention consists in'm'eans for varying the valve operation ininternal combustion engines having-valves of the 'concentric slidingsleeve type, byyarying the mean position and relative phase of operationof the inner sleeve.

The invention further consists in means 'for varying the valve-oeration' in such en-- gines, by giving the sha which reciprocates' thevalve element translational and rotational movement.

The invention-furtherconsists in the proved valve gear for internalcombust on engines-hereinafter described.

- n carrylng mymventlon into effect as applied to anengine of' knowntype, I

preferably arran e the inner and outer concentric sleeve va ves to bedriven by inde-- endent lay shafts, and I mount the shaft yiwhich theinner sleeve is driven in a frame or otherwise, 'so that it maybe movedthrough 'a certain range, the said motion be-: at right angles to theaxis of revolution.

The'motion is preferably arranged to take place concentrically to thegear by which the shaft, is driven, so'that the said earremains'constantly in mesh, consequent y as the shaft is moved translatinally itat the same "time undergoes'a rota movement through a certainangle relative y to former posi tion, this rotary movement giving thenecessary advance or reta'rdIto the inner sleeve I 'valve aforesaid. Thediam eter of the earand thedirection of the motion imparte to .5

' 'parts, are so adjusted that the change of .tim-

the shaft and the positions of the various .im,..'mfi a; enemas sashm;VALVE-palm, br-mmnmxreonmsnqn Emirates??? V Speciiication of Letter-Patent Apr. v Application fil ed January 18,'19 10, "SeriaiNo. 538,629.7

ing due' to the rotariyrdisplacement of the'i shaft is accom'panie' "bya cha-n ein the:

position of the point of mid stro QaOfnilllG valve, and thus the pointof-cut-ofi' -may=beu6 0f varied and the timin of the exhaust releasedmay be simultaneous y modified to ainyfdsired degree. 132 i. I Theoperation of the shaft movementmayr be accomplished by a rotary governoreither directly or through a relay of some kind, or any other kind ofovernor or hand COllU'Ol' may be employed for" the said purposefl 35*???Referring to the-accompanying sheet'of drawings which show avertical-section transverse 'to the crank shaft of anengine constructedaccordingto this invention; A i is thecrank shaft,'B theconnectingrod,-and C the cylinder of an internal combustion en gineworking on the four, stroke cycle. Th e '3 inlet and exhaust portsJ andH respectively are controlled in the customary manner by an innersleeveD and an outer sleeveFg" The sleeves D and F are driven by the 'c'onnecting rods E and G from two parallel cranked shafts L and K which are-causecl--'.

'to revolve at the same speed of revolution by an equal pair of gears OO; theshaft Kj is driven from the crank shaft by the usual two'to onemotion shown as a chain drive' M N; the chain wheels are'lndicatedbytheir pit ch lines. T parallel shafts-Land K are mounted in acylindrical container P which" is mounted revolubly apertures borediii"the walls of'the crank case inthe 1nann'er shown. A lever'Q is providedwhereby thein such a manner that the duration of period 'durin"whichtheinner sleev p Q Tf a. are uncovere 1s var1ed,'the timing ofmenia position or dead center beingsubstantially unaffected, andsecondly itrec'eives a rotary, motion due to the. eplcyclic. actiongears,,whereby the timing of mean positi of the said perio'd is' alsocaused to 'vwi r-u The, variation of both" the duration oflthe periodand the timing of the opening and ton reciprocatin cut-01f thussimultaneous, being effectedby the snnple movement of the one lever Q.

It'will be understood that when the'lever Q is set for full load, bothsleeves function in the, usual-manner theexhaust release takes placeabout degrees'beforethe out-center and the feed cut-oil. takes placeabout 20 01*- 30 degrees after the subsequent out center. VVh'en thelever Q is set for running light,

the exhaust may conveniently be made to open :IPIOXlllltltQlY at theout-center and the fee cut-off is arranged to take place at 2.'In aninternal combnstion cngine, in.

combination, a sleeve valve, a working piston reciprocating within saidsleeve va ve, and means for simultaneously altering the stroke timerelatively to said piston and displacing the point of mid travel of-saidsleeve valve.

3. In an internal combustion engine, in combination, a working piston,two co-axial sleeve. valves surrounding said piston, and

means for altering the stroke time relatively to said piston of one ofsaid sleeve valves.

4. In an internal combustion engine, in

combination, a working piston, two co-axial sleeve valves surroundingsaid piston, and means for displacingthe point of mid travel of one ofsaid sleeve valves. 5. In an internal combustion engine, in combination,aworkin r piston, two co -axial sleeve valves surrounding said iston,and means for displacing the point 0 mid travel of the inner of saidsleeve valves. 5

6. In an internal combustion engine, in combination, a working piston,two ce-axial sleeve valves surrounding said. piston, and

means for simultaneously alterirtg. the stroke time relatively to saidpiston an dis )laclng the point of mid travel of one of sai sleeve g thepoint of mid travc valves. I

7. In an internal combustion engine,. in

combinatimi, a working piston, two co-axial sleeve valves surroundingsaid piston, and

means for simultaneously altering the stroke time relatively to saidiston and displacing i of the inner of. said sleeve valves. p

8. In an internal combustion engine, in combination, a sleeve valve, :1working piston reciprocating within said sleeve valve, means fordisplacing the ,point of mid travel of said sleeve valve, said meansincluding a 2 i J ced-752 shaft, 11 orankor eccentric carried on saidshaft, means connecting saidicrank or eecentricto' said sleev'evalve,and means for moving said shaft. arallel' to itself,

'9. In an interns. combustion engine, in combination, a sleeve valve, aworking piston' reciprocating within said sleeve val re,

means for simultaneously altering the stroke time relatively to saidpiston anilfllisplacing the point ,ofmid'travel of said sleeve tvalvc,said means including a shaft, :1. crank or eccentric carried onsaidshaft, means-connecting said crank or eccentric tosaid sleeve valve,and means for moving said shaft parallel'toitself. 1 i 10.' In aninternal combustionengine, in combination, a working piston, twoco-axial sleeve valves surrounding said piston, means for displacing theoint of mid travel of one of said valves, Sillt means including a shaft,a crank or eccentriccarried on said shaft, means connectingsaid crank oreccentric to said sleeve valve, and means for moving said shaft parallelto itself. r a 11. In an internal combustion engine, in combination, aworking-piston, two co-axial sleevevalves surround n said piston, means.for simultaneously altering-the stroke time to sa d piston anddisplacing the relativel point 0 mid travel of one of'said valves,

said means including a shaft, a crank on eccentric carried on saidshaft, moans connecting said crank or eccentric to said sleeve valve,and means for moving said shaft parallel to itself. I

' 12. In an internal combustion engine, in

combination, a sleeve valve, a working )iston rcei )rocating'withinsaid' sleeve vaivc,

means or reciprocating said valve, said means including'a shaft, aneccentric or crank carried by said shaft and connect-ed to said valve,and meansfor-altering the stroke time relatively to said piston ol saidvalve, said means including lxaarings carry- .ing. said shaft andrevoluble about'a point eccentric to said shaft 13. In an internalcombustion engine, in comb ation, asleeve valve, a working )istonrcciprmzating within said sleeve va vo, means for reciprocating saidvalve,- said means including a shaft, an eccentricoz crank carried bysaid'shaft and connected to said valve, and me'anstor disphuzinglhepoint of mid travel of said-valve, said means including bearingscarrylng said shaft andrevolublc about a point eccentric tosaid shaft.

14, In an internalcombustion engine, in combination, a sleeve valve, aworking'pistoirrcci roeating within said sleeve valve, means orreciprmzati'ng said-valve, said means including a shaft, an eccentric or,crank carried bysaid shaft and connected to said valve, and means forsinmltaneously altering the stroke tune relatively to said p revolubleabout a combinatioin'a working piston, two co-axial sleeve valvessurrounding said piston, means for rec:procat1n said valves, said meansincluding two siafts, eccentrics or cranks 0 carried by said shafts andconnected to said valves, -and means for altering the stroke timerelatively to said piston of one of said valves, said means includinghearings carrying the shaft connected to said valve and pointeccentricto said shaft.

16. In an internal combustion engine, in combination, a working piston,two co-a-xial sleeve valves surrounding said piston, means forreciprocatin said valves, said means including two sliafts, eccentricsor cranks carried by said shafts and connected to said valves, and meansfor displacing the point of mid travel of one of said valves, said.means including bearings carrying the shaft connected to said valve andrevoluble about a point eccentric to said shaft.

l7.'In an internal combustion engine, in combination, a working piston,two co-axial sleeve valves surrounding said piston, lllttltlhf .forreciprtwatin said valves, said means including two siiafts, eccentricsor crankscarried hy said shafts and connected to said -valves, and'means for sinniltaneousl Y altering the stroke time relatively to saitpiston and displacing the point of mid travel of one of said valves,said means including bearings carrying the shaft connected to said valveand revoluble about a point 40 eccenti-'ic-to said shaft. 18. Inaninternal combustion engine, in combination, a. working piston, twoco-axial sleeve valves surrounding said piston, means for. reciprocatinrsaid valves, said means 46 including two s iafts, eccentrics or crankscarried by said shafts and connected to said valves, and means foralterin the stroke time relatively'to said piston 0 one of said valves,said means including bearings carryto ing the shaft connected to saidvalve and revoluble about the shaft connected to the otherof saidvalves. 7

19, In an internal combustion engine, in combination, a'working piston,two co-axial 65 sleeve valves surrounding said piston, means forreciprocatin said va ves, said means including .two sha ts, eccentricsor cranks car: ried by said shafts" and connected to said valves, andmeans for displacing the point efniid travel of 'oneof said valves, saidmeans includin bearings carrying the shaft connected to said valve andrevoluble about the shaft connected to the other of saidvalves. V 20. Inan internal combustion-engine, in

combination, ree-r ngpistomtwo coaxialsleeve vaIves surrounding saidpiston, means for recijn'ocating said valves, said-means ineluding-twoshafts, eccentrics or cranks carried by said shafts and co nected tosaid valves, and-means forsimuitaneousl altering the stroke timerelatively to sai piston and displacing the point of mid travel of oneof said valves, said means including bearings carrying the shaftconnected to said valve and revoluble about the. shaft connected to theother of said valves.

21. In an internal combustion engine, in combination, a working piston,avo co-axial sleeve valves surrounding'iid piston, means forreciprocating said valves, said means including'two shafts, eccentricsor cranks carried by said shafts and connected to said valves, and meansfor altering the stroke.

time relatively to said piston of the inner ofsaid valves, said meansincluding bear- .ings carrying the shaft conncrteii to said e valve andrevoluble about. the shaft connected to the outer of said valves.

' 22. .In an internal combustion engine, in combination, a. workingpiston, two coaxial sleeve valves surrouiuling said piston, means forreciprocating said valves, said means including two shafts, eccentricsor cranks carried by said shafts and connected to said valves, and meansfor displacing the point of mid travel of the inner of said valves, saidmeans including bearings carrying the shaft connected to said valve andrevoluble about the shaft connected to the-outer of said valves. I

23. In an internal combustion engine, in combination, a working piston,two co-axial sleeve valves surrounding said piston, means forreciprocating said-valves, said means ineluding two shafts, eccentricsor cranks carried by said shafts and connected to said valves, and meansfor siniultaneousljy altering the stroke time relatively to sai pistonand displacing the point of mid travel of the inner of said valves, saidmeans including hearings carrying the shaft connected to said valve andrevoluhle about the shaft con- HARRY DAVIS.

